Blue-printing machine.



N. H. BROWN. BLUE PRINTING MAGHINE.

APPLICATION FILED 0012.13, 1909.

"962,741. Patented June 28,1910.

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% INVENTO x WITNESSES Edi -,1 'A'INIEIJ H. BROWN, OE PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HENRY S.

ii '14 JLIAT/IS, OF PHILADELPHIA, PENNSYLVANIA, NATHANIEL H. BROWN, OF

EQRRISTOVJN, PENNSYLVANIA, I

JANE MORRIS EABLE,

OF T:IILADELPHIA,

' ENNElYLVANIA, TRADING AS THE FIRM OF WILLIAMS, BRO'WN AND EARLE, OF

' ILADELPI-HA, PENNSYLVANZA.

BLUE-PRINTING MACHINE.

.a all abhom'ii may concern:

Be it known that l, i a'rrrarunr, H. Brown, a ieitisen of the United States, residing at the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain-new and useful improvements in Blue-Printing Machines, of which the following is a specification.

My present invention relates to improvements in blue printing machines patented to nee February 17th, 1903 and November 17th, 1903, and numbered 721,011 and 744,039 and of a pending application for a patent Serial No. 373,616, filed by me under date of May 14th, 1907.

In the present instance, the improvements in a blue printing machine reside first, in the manner of mounting a transparent bed of annealed or non-annealed glass in such a machine second, in the manner "of com- ;pensating for inequalities in matter passing hetween the bed and, an endless eonveyer "carrying the blue-printing paper and obijlective or drawing t. b copied; third, in 25 the manner of preventing breakage of the glass by intensity of the heat to which exposed in use, from a-series of arc lights in which presence the sensitive paper to receive the object or drawing quickly thereon is exposed, and while traveling in rear of the bed carried by said conveyor; fourth, in the manner of feeding regularly and evenly the paper with the objective or drawing thereon into the presence of the intense light emit-ting bodies a .l which also serves to guard or protect the eyes of the operator againstthe inlhicnce of such light emitting bodies; fifth, in the manner of automatically shifting back and forth the bed in the cradle or supporting frame therefor and; sixth, in

- the manner of cushioning the bed against contact with metal in the shiftings calculated to affect the glass bed and thus to prevent possible breakage of the glass bed due to ditl'orence in temperature of the bed with respect to that of the supporting means therefor, in shiftings changing momentarily the temperature of the bed with respect to its supporting trame, and thus if not provided for, subjccti::ig the bed unduly to breakage.

Specification or Letters Patent. yaigrgm-hgfil J 23 Application iled Gctober 13,

My in vention for a blue printing machine,

isoa. Serial no. 522,371.

will be more fully understood from the accompanying drawings taken in coniiection with the following description, in which,

Figure 1, a vertical central section through a blue printing machine embodying thesaid defined features of my invention; and Fig. 2, is a sectional detail view of the manner of mounting the glass bed in its cradle or supporting frame, showing the leather, rubber or similar insulating gasket against which it engages in said frame.

Referring to the drawing a, is one of the two end standards and a the end supporting longitudinal frames for the feed-table a of the machine.

6, 7), are carrier rolls for an endless conveyer 5 of duck or other flexible material and which rolls are ournaled to the end standards a, the roll being driven by a mechanism, not shown, but may be of the type set forth in my said pendil'ig applica tion Serial No. 373,616, of'May 14th, 1907, here-inbefore mentioned.

0, is a transparent annealed or non-annealed glass bed, supported in upright operative position in a cradle or skeleton frame (5, and so arranged as to provide a convexshaped contact surface to the travel of blue printing or other sensitized paper with an object or drawing thereon, to be copied thereby, between the traveling conveyer 7/ and bed (7. The cradle or frame (Z, for supporting the bed, is held in a vertical position by means of end vertical rods d; which are bolted to the respective standards a, and these rods are each provided with extension bars (Z 17 at the upper and lower portions of the said rods. 'lhesc bars extend through bearings of the frame or cradle d, on which beyond the saidframe are mounted coiled springs (Z", and each bar bring threaded for a portion of the length of the same to receive a jam-nut d, to increase the spring tension of the said frame against said bed, as may be required. The upper and lower extremital portions of the glass bed (1, its into pockets or recesses d", al and one or both sides of the said recesses or pockets are stripped lengthwise with leather, rubber or throughout, in order that its travel from the table bed coming in contact with the ,metal portions of the cradle or frame d, and thus to' reduce possible breakage or cracking of the glass-bed to a minimum. It has been found that when a glass-bed is exposed to the intensity of a series of electric arc lights f, confined within a hood g, as illustrated in Fig. 1, if the bed is in contact with metal, there is a greater tendency-to crack the glass of the bed, than if the bed is arranged as shown in Figs. 1 and 2, so as to bear against a leather, rubber or other insulating material in the form of strips arranged between the metal frame and the bed. Moreover, it has been found in extended practice of the said machine, that thebed 0, must be so arranged as to yield in its supporting frame cZ, so as to compensate for inequalities between the fed sensitized paper carrying the object or drawing to be copied and the bed 0, to insure avoidance of cracking of the same. The tensioning spring controlled bars (Z 4Z are provided therefor, and they practically have been foun d to avoid such breakage. In one end of the hood is provided an opening 9 about which opening is mounted afan or similar air cooling means h, for maintaining while the machine is in operation, the chambered compartment formed between the bed 0, and hood 9, within which ,is arranged the series of electric arc lights uniformly cool or at a substantially uniform temperature miner-heating of the bed with its attending dangers of cracking or breaking the glass thereof, may be absolutely avoided. In the lower portion of the machine beneath the bed 0, and conveyer 6 is located a trough z' to receive the printed paper, tracing or object carried on the said paper and object copied'thereby.

is a combined irregular V-shaped feed device and operative shield secured to the end standards of the machine as clearly shown in Fig. l, and so arranged as to permit of regulated feeding without crimping or creasing the paper and object or drawing to be printed or copied upon the paper, in

the endless conveyor 5 and bed 0, and in a downward direction therefrom, when printedg-iarto the receiving trough i, for being removed, and the printed paper then washed anddried, for 'stibsequent use.

Having thus described the nature and objects o .my invention, what I claim as new and desire to secure by Letters Patent'iSz- 1. In-- a machine of the character. described, a bed, a cradle therefor, an endless conveyer located on one side of the bed and in contact therewith, meansto support the bed in....the "cradle and the latter having spring controlled means on by said conve'yer.

said bed, (L2, to and between.

yieldin ly support mg the. bed agafnst pressure ex erted there- 3. in a machine of the character'da scribed, a glass bed, an endless conveyer in .rear of said bed and normally contacting therewith, a cradle, provided with pockets to receive and support the bed and having' insulating material mounted in said pockets against which the bed engages, said cradle being provided with spring controlled means to tension the bed in said cradle.

4. In a machine of the character described, a bed, a cradle for receiving and supporting the same and having tensioning means for cushioning said bed, a conveyer normally contacting with said bed and a feeding device and shield or guard located at one end. of said bed andconveyer.

5. In a nachine--of the character de scribed, a bed, a cradle therefor, an endless conveyor located in ..rear of said bed and normally bearing against the same, means connected with said cradle to support the bed in said cradle, said means having spring controlled means yieldingly supporting said bed against the pressure of an object assing between said conveyer and bed, a ceding device and shield located at one end of said conveyor and bed and a lighting means arranged in front of said bed.

6. In a" machine of the character described, a bed, a cradletherefor, an endless conveyor located in rear of said bed and. nornnillyj bearing against thesame, means connected with said cradle to support the bed in said cradle, said means having spring controlled means yieldingly supporting said bed against pressure of an obiect or article passing between said conveyor and bed, a feeding device and shield or guard located at one end of said. conveyer and bed, an inclosed lighting means arranged in front of with an ppening in which a ventilating device is mounted and means for actuating the same. p 1

T. In a niachina of. the. character de-.

scribed, an endless conveyer, a convexshaped bed located in front of said conveyer and arranged to contact therewith, a skeleton frame for said bed having insulated pockets and spring tensioning means for said bed yielding to pressure of matter passing between said -conveyer and bed, a light emitting body arranged in front of said bed, a hopd inclosing the same and a feed wheredf one portion is provided ing device located at one end of said c0n-,

veyer and bed to shield an operator in feeding matter to be printed.

8. In a machine of the character de-' scribed, a bed, a cradle having means to support the ends of said bed in an operative position, means yieldingly supporting the bed against pressure from the rear by a passing article, a light-emitting body arranged in front of said bed, a hood inolosing said body and having an opening Wherein a ventilating device is arranged and actuating-means therefor, to maintain the temperature Within the hood, substantially uni- 10 form.

In witness whereof, I have hereunto set my signature in the presence of two subscribing Witnesses.

NATHANIEL H. BROVN.

Witnesses:

THOMAS M. SMITH, ELISABETH A. SHELDRAKE. 

